
#part1{
    background-image: url("../img/poster-part1.jpg");
    position: relative;
    padding: 0;
}#part2{
    background-image: url("../img/poster-part2.jpg");
}#part3{
    background-image: url("../img/poster-part3.jpg");
}
.fo-part{
    width: 100vw;
    height: 100vh;
    background-repeat: no-repeat;
    background-size: 100% 100%;
    padding: 20px 0;
}
#part1-content{
    position: relative;
    color: white;
}
#part1-container{
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}
#banner-title{
    color: white;
    font-size: 3em;
}
.fo-overlay{/*蒙版*/
    position: absolute;
    width:100%;
    height: 100%;
    background-color: rgba(4,9,30,0.85);
}
#part1-btn{
    background-color:#79c700;
    border: 0;
    padding: 4px 8px;
}
#part2-container{
    display: flex;
    justify-content: center;
    align-items: center;
}
#part2{
    color: white;
}
.fo-feature-part{
    border: solid 1px white;
    padding: 15px;
}
.fo-feature-part img{
    width: 328px;
    height: 231px;
}
#part3-wrapper{
    display: flex;
    justify-content: center;
    align-items: center;

    height: 100%;
}
#part3{
    color: #c2c2c2;
}

#part3-body{
    height: 200px;
    position: relative;
}
.fo-part3-box{
    height: 100%;
}
#part3-box-left{
    background-repeat: no-repeat;
    background-position: center center;
    background-size: 100% 100%;

    /*animation*/
    transition-duration: 0.5s;
    transition-property: all;
    transition-timing-function: ease;
}

#part3-box-right {
    background-color: white;

    display: flex;
    justify-content: center;
    align-items: center;

    /*animation*/
    transition-duration: 0.5s;
    transition-property: all;
    transition-timing-function: ease;
}
#part3-box-right-content{
}
#part3-btn-wrapper{
    position: absolute;
    left: 64.7%;
    top: 45%;
}
#part3-btn-left{
    color: white;
}
#part3-btn-right{
    color: black;
}
.fo-part3-btn{
    display: inline-block;
    width: 20px;
    height: 20px;
    cursor: pointer;
}

#fixed-side-nav{
    position: fixed;

    width: 124px;
    height: 200px;
    left: 88%;
    top: 31%;
}
.fixed-side-nav-item{
    line-height: 81px;
    list-style: none;
    color: white;
    font-size: 1.5em;
    cursor: pointer;
}
/********************/
/*responsive design*/
/********************/
@media screen and (max-width: 768px) {

}